A waterproof structure and construction method for underground engineering wall-penetrating pipe bonding

Abstract

A waterproof structure and construction method for wall-penetrating pipes in underground projects, which relate to the technical field of waterproofing for wall-penetrating pipes. The waterproof structure for wall-penetrating pipes in underground projects includes: a wall body; a waterproof roll provided on the water-facing side of the wall body; a sleeve penetrating the wall body; a wall-penetrating pipe placed in the sleeve; a support ring sleeved on the wall-penetrating pipe and abutting the front side of the sleeve; and a water-stop sleeve sleeved on the wall-penetrating pipe and abutting the front side of the support ring; the water-stop sleeve and the wall-penetrating pipe, and the water-stop sleeve and the wall body are all bonded by adhesive. The above technical solution has the advantages of high waterproof reliability, long service life, simple structure, low cost, is suitable for occasions with frequent vibrations, and can withstand high water pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of wall-penetrating pipe waterproofing, and in particular to an underground engineering wall-penetrating pipe bonding waterproofing structure and a construction method. Background Art

[0002] Typically, underground projects utilize a continuous waterproofing membrane installed on the side walls. This membrane must be disconnected at the site of the pipe penetration to allow for passage. This area is a weak link in the waterproofing project and has a high leakage rate. According to the national standard GB50108, "Technical Code for Waterproofing of Underground Projects," the following waterproofing structures should be used where waterproofing is required.

[0003] like Figure 1 (Excerpt from Section 5.3.4 of GB50108 "Technical Code for Waterproofing of Underground Engineering") shows a flexible sleeve-type wall-penetrating pipe waterproofing structure.

[0004] The current standard approach has the following shortcomings:

[0005] First, the waterproof reliability is low.

[0006] 1. The overlap between the waterproof membrane and the wall pipe on the outer wall of the underground project is a weak point in waterproofing. The membrane must be disconnected at the location of the wall pipe. The specification requires that the gap between the membrane and the wall pipe be filled with sealing materials (polysulfide sealing paste, polyurethane sealing paste) around the wall pipe. However, the sealing paste has low adhesion, is not resistant to water erosion, cannot withstand water pressure, does not have long-term waterproofing ability, and cannot achieve satisfactory results.

[0007] 2. The backing filler and filling materials (asphalt hemp, polystyrene foam board, etc.) do not have waterproof function.

[0008] 3. The casing is cast in the concrete wall. Since the concrete and the casing are not bonded, after casting, the concrete shrinks and a gap exists between the casing and the concrete. The casing wing ring is also not bonded to the concrete, and there is also a gap between the two. Under the action of pressurized water, external water can bypass the wing ring and enter the room.

[0009] 4. A retaining ring is installed inside the backwater casing. The inner diameter of the retaining ring is larger than the outer diameter of the wall pipe. As a result, a leaky bottom and defective stuffing box are formed between the casing and the wall pipe. A rubber ring is placed inside the stuffing box and pressed with a flange gland. This causes the rubber ring to elastically deform and block the gap, preventing water from passing through. This structure is inherently unreliable. Under long-term pressure and frequent vibration, the rubber ages, resulting in a short service life. Moreover, it cannot withstand high water pressure.

[0010] Secondly, there are many materials, complex structures, and cumbersome processes. Multiple waterproofing measures are set up, but the reliability of each measure is not high, the construction speed is slow, and the cost is high.

[0011] Third, after the exterior wall is poured, the position of the wall-penetrating pipe changes, making it very difficult to install the wall-penetrating pipe with waterproofing requirements. Summary of the Invention

[0012] The purpose of the present invention is to address the defects and shortcomings of the existing technology and provide an underground engineering wall-penetrating pipe bonding waterproof structure, which has the advantages of high waterproof reliability, long service life, simple structure, low cost, suitable for occasions with frequent vibrations, and able to withstand high water pressure.

[0013] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a wall-penetrating pipe bonding waterproof structure for underground projects, comprising: a wall; a waterproof membrane arranged on the water-facing side of the wall; a sleeve passing through the wall; a wall-penetrating pipe placed in the sleeve; a support ring mounted on the wall-penetrating pipe and abutting the front side of the sleeve; and a water-stop sleeve mounted on the wall-penetrating pipe and abutting the front side of the support ring; the water-stop sleeve and the wall-penetrating pipe, as well as the water-stop sleeve and the wall, are bonded by adhesive.

[0014] The present invention further provides that a hidden pile hole is provided on the wall outside the support ring; the hidden pile hole is filled with an epoxy adhesive for bonding with the water stop sleeve.

[0015] The present invention further provides that the underground engineering wall-penetrating pipe adhesive waterproof structure also includes: double-sided polyisobutylene tape; the waterproof membrane and the water-stop sleeve are overlapped by the double-sided polyisobutylene tape.

[0016] The present invention further provides that the underground engineering wall-penetrating pipe adhesive waterproof structure also includes: a pipe clamp that is sleeved on the water-stop sleeve and locks the water-stop sleeve on the wall-penetrating pipe.

[0017] The present invention further provides that the adhesive is an epoxy adhesive.

[0018] The present invention further provides that the water-stop sleeve is a soft PVC water-stop sleeve.

[0019] After adopting the above technical solution, the beneficial effects of the present invention are:

[0020] 1. In the present invention, an adhesive waterproof structure is adopted, and the adhesive eliminates the gaps between the wall and the sleeve and the wall-penetrating pipe; the water-stop sleeve is responsible for sealing and water-stopping, and tolerates frequent vibrations and short-distance mutual misalignment between the wall-penetrating pipe and the wall; the support ring arranged behind the water-stop sleeve is used to support the water-stop sleeve to resist external water pressure; and the water-stop sleeve and the support ring are not bonded, because the PVC water-stop sleeve is flexible, a small distance of relative displacement between the wall-penetrating pipe and the wall is allowed. Such a setting has high waterproof reliability, is resistant to water erosion, can withstand water pressure, and has long-term waterproof capabilities. In addition, a sleeve is provided to protect the wall-penetrating pipe. Because the water-stop sleeve is partially bonded to the wall, the leakage gap between the sleeve and the wall is blocked, so there is no need to set a water-stop wing ring on the sleeve, making the structure simpler.

[0021] 2. In the present invention, hidden pile holes are provided on the wall, and the hidden pile holes are filled with epoxy adhesive, which effectively prevents the sand on the wall surface from being peeled off when the water stop is under stress, thereby protecting the stability of the bonding joint.

[0022] 3. In the present invention, double-sided polyisobutylene tape is selected to overlap the water stop sleeve and the waterproof membrane. The overlap quality is durable and reliable, avoiding the weakness of the traditional method of using sealing paste for overlap that is easy to fall off.

[0023] 4. In the present invention, the adhesive is an epoxy adhesive. Epoxy adhesive can be cured in water, so it can be constructed in a water environment on site.

[0024] In view of the defects and shortcomings of the existing technology, the second purpose of the present invention is to provide a construction method for waterproofing wall-penetrating pipes in underground projects, which has the advantages of simplifying the process, shortening the construction period and reducing costs.

[0025] To achieve the above object, the technical solution adopted by the present invention is: a construction method for waterproofing underground wall pipes, comprising the following steps:

[0026] S1. Place the casing in the wall, fix the casing in place, install the formwork, and then cast the wall;

[0027] S2. Remove the template and place the wall pipe into the casing for installation and positioning;

[0028] S3. Insert the support ring into the wall pipe, with the support ring abutting against the sleeve;

[0029] S4. Drill hidden pile holes on the wall outside the support ring;

[0030] S5. Clean the bonding area of ​​the wall pipe and apply a layer of epoxy adhesive.

[0031] S6. Put the water stop sleeve into the wall pipe and tighten it with a pipe clamp;

[0032] S7. Apply epoxy adhesive to the bonding area on the wall outside the support ring, fill the epoxy adhesive in the hidden pile hole, and bond the water stop sleeve;

[0033] S8. On the water-facing side, the waterstop sleeve is overlapped with double-sided polyisobutylene tape and waterproof membrane to make it seamlessly connected.

[0034] The present invention is further provided that, in S6, the water-stop sleeve is heated by a hot air blower and is put into the wall-penetrating pipe while it is still hot.

[0035] After adopting the above technical solution, the beneficial effects of the present invention are:

[0036] 1. Compared with the traditional method, the present invention simplifies the process, reduces the number of parts and materials, shortens the construction period and reduces the cost.

[0037] 2. In the present invention, if the design is changed after the wall is poured, the hole can be re-drilled and the wall-penetrating pipe can be installed.

[0038] 3. Compared with the traditional method, the present invention can withstand higher water pressure and has higher waterproof reliability.

[0039] 4. Compared with the traditional method, the present invention is more suitable for occasions with frequent vibrations (such as subway culverts and pipeline corridors under highways) and has a long service life.

[0040] 5. In the present invention, the water stop sleeve is fixed with a pipe clamp after bonding, which helps to ensure the bonding quality.

[0041] 6. In the present invention, hidden pile holes are drilled on the wall outside the support ring, filled with epoxy adhesive during bonding, and formed into hidden piles after curing to keep the bonding system stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 It is a structural diagram of background technology;

[0044] Figure 2 This is a schematic diagram of the underground engineering wall-penetrating pipe bonding waterproof structure;

[0045] Figure 3 It is a structural diagram for placing casing and pouring wall;

[0046] Figure 4This is a schematic diagram of removing the mold and inserting the wall pipe;

[0047] Figure 5 This is a schematic diagram of placing support rings, drilling concealed pile holes, and filling the concealed pile holes with epoxy adhesive;

[0048] Figure 6 This is a diagram of cleaning the wall pipe, bonding the water stop sleeve, and installing the pipe clamp;

[0049] Figure 7 It is a schematic diagram of the overlap between the waterstop sleeve and the waterproof membrane.

[0050] Explanation of the accompanying symbols: 1. Wall; 2. Waterproof membrane; 3. Casing; 4. Wall pipe; 5. Support ring; 6. Water stop sleeve; 7. Concealed pile hole; 8. Pipe clamp; 9. Template. DETAILED DESCRIPTION

[0051] The present invention will be further described in detail below with reference to the accompanying drawings.

[0052] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

[0053] This embodiment relates to an underground engineering wall-penetrating pipe bonding waterproof structure. Figure 2-Figure 7 In the figure, the left side is the water-facing side and the right side is the water-facing side. Figure 2As shown, the system comprises: a wall 1, a waterproof membrane 2 installed on the water-facing side of the wall 1, a sleeve 3 extending through the wall 1, a wall-penetrating pipe 4 inserted into the sleeve 3, a support ring 5 extending over the wall-penetrating pipe 4 and abutting the front of the sleeve 3, and a waterstop sleeve 6 extending over the wall-penetrating pipe 4 and abutting the front of the support ring 5. The length of the sleeve 3 is the same as the thickness of the wall 1. The inner diameter of the sleeve 3 is one size larger than that of the wall-penetrating pipe 4. The waterstop sleeve 6 is bonded to the wall-penetrating pipe 4 and to the wall 1 with adhesive. The above-mentioned adhesive waterproofing structure utilizes an adhesive that eliminates gaps between the wall 1 and the sleeve 3 and wall-penetrating tube 4. The waterstop sleeve 6 is responsible for sealing and watertightening, and tolerates vibration and short-distance displacement between the wall-penetrating tube 4 and the wall 1. The support ring 5, located behind the waterstop sleeve 6, supports the waterstop sleeve 6 against external water pressure. Furthermore, the waterstop sleeve 6 and the support ring 5 are not bonded together. Because the PVC waterstop sleeve 6 is flexible, it allows for small relative displacement between the wall-penetrating tube 4 and the wall 1. This arrangement provides high waterproof reliability, resistance to water erosion, water pressure, and long-term waterproofing. Furthermore, the sleeve 3 is provided to protect the wall-penetrating tube 4. Because the waterstop sleeve 6 is partially bonded to the wall 1, blocking the leakage gap between the sleeve 3 and the wall 1, a waterstop wing ring is not required on the sleeve 3, making the structure simpler. In this embodiment, the adhesive is an epoxy adhesive. Epoxy adhesive cures in water, and therefore, can be applied in a water-rich environment on site.

[0054] Likewise Figure 2 As shown, a hidden pile hole 7 is provided on the wall 1 outside the support ring 5, and the hidden pile hole 7 is filled with an epoxy adhesive for bonding with the water stop sleeve 6. This arrangement effectively prevents the sand on the surface of the wall 1 from being peeled off when the water stop is under force, thereby protecting the stability of the bonding joint.

[0055] The underground engineering wall-penetrating pipe adhesive waterproofing structure also includes double-sided polyisobutylene tape. The double-sided polyisobutylene tape is used to overlap the waterproof membrane 2 and the waterstop sleeve 6. This double-sided polyisobutylene tape ensures a reliable joint and avoids the vulnerability of traditional sealing paste, which can easily fall off.

[0056] Further, such as Figure 2 As shown, the underground engineering wall-penetrating pipe 4 adhesive waterproof structure further includes: a pipe clamp 8 sleeved on the water-stop sleeve 6. Installing the pipe clamp 8 can further lock the water stop on the wall-penetrating pipe 4.

[0057] In this embodiment, the water-stop sleeve 6 is a soft PVC water-stop sleeve.

[0058] The working principle of the present invention is roughly as follows: a bonding waterproof structure is adopted, and the adhesive eliminates the gap between the wall 1 and the sleeve 3 and the wall-penetrating pipe 4; the water-stop sleeve 6 is responsible for sealing and water-stopping, and tolerates vibration and short-distance mutual misalignment between the wall-penetrating pipe 4 and the wall 1; the support ring 5 set behind the water-stop sleeve 6 is used to support the water-stop sleeve 6 to resist external water pressure; this arrangement has high waterproof reliability, is resistant to water erosion, can withstand water pressure, and has long-term waterproof capabilities. In addition, the sleeve 3 is provided to protect the wall-penetrating pipe 4. Because the water-stop sleeve 6 is partially bonded to the wall 1, the leakage gap between the sleeve 3 and the wall 1 is blocked, so there is no need to set a water-stop wing ring on the sleeve 3, making the structure simpler.

[0059] The present invention also relates to a construction method for waterproofing underground wall pipes. This embodiment uses a DN100 wall pipe (Φ114 PVC drainage pipe) as an example to illustrate the process. The inner diameter of the casing 3 is one size larger than that of the wall pipe 4, and the DN125 (Φ133 x 5) length is the same thickness as the wall 1.

[0060] like Figure 3-Figure 7 As shown, the following steps are included:

[0061] S1. Place the sleeve 3 in the wall 1, fix the sleeve 3 in place, install the formwork 9, and then cast the wall 1;

[0062] S2, remove the template 9, put the wall pipe 4 into the sleeve 3 and install it in position;

[0063] S3, insert the support ring 5 into the wall pipe 4, and the support ring 5 abuts against the sleeve 3;

[0064] S4, drilling hidden pile holes 7 on the wall 1 outside the support ring 5;

[0065] S5. Clean the bonding area of ​​the wall-penetrating pipe 4 and apply a layer of epoxy adhesive.

[0066] S6. Insert the water stop sleeve 6 into the wall pipe 4 and tighten it with the pipe clamp 8;

[0067] S7, apply epoxy adhesive to the bonding area on the wall 1 along the outside of the support ring 5, fill the epoxy adhesive in the hidden pile hole 7, and bond the water stop sleeve 6; temporarily fix the water stop sleeve 6, and do not disturb it during the curing of the adhesive;

[0068] S8. On the water-facing side, the water-stop sleeve 6 is overlapped with the waterproof membrane 2 using double-sided polyisobutylene tape to make it seamlessly connected.

[0069] At this point, the waterproofing process is complete and interior decoration can begin on the side facing away from the water.

[0070] Among them, the material requirements for the water stop sleeve 6 are: using migration-resistant plasticizers and complying with the requirements of the national standard GB12952 "Polyvinyl chloride (PVC) waterproof membrane 2".

[0071] The epoxy resin adhesive designed specifically for PVC coils has a bond strength greater than that of the original PVC, is resistant to aging, and can be used underwater. This adhesive is only suitable for PVC and metal pipes and cannot be used on non-polar materials such as rubber, PP, PE, and PC.

[0072] Compared with traditional methods, this method simplifies the process, reduces the number of components and materials, shortens the construction period, and reduces costs. It can withstand higher water pressures, has higher waterproof reliability, and is more suitable for applications with frequent vibration (such as subway culverts and highway pipeline corridors), with a long service life. Furthermore, if the design of the wall 1 is changed after pouring, the hole can be re-drilled and the through-wall pipe 4 can be installed.

[0073] In S4, holes are drilled on the wall 1 along the outer side of the support ring 5 using an impact drill. The holes have a diameter of 10 mm and a depth of 20 mm and are evenly distributed along a Φ200 circumference.

[0074] In S6, the water-stop sleeve 6 is heated by a hot air blower and is put into the wall-penetrating pipe 4 while it is still hot.

[0075] The water-stop sleeve 6 and the support ring 5 can be manufactured on site or in a factory.

[0076] Use PVC coil to make waterstop: take 1.5mm thick homogeneous PVC coil, cut it into 240×240 square, cut a round hole in the middle of the PVC coil with a diameter smaller than the outer diameter of the pipe. For example, for a Φ114 pipe, you can open a Φ70 hole.

[0077] The above is only used to illustrate the technical solution of the present invention and is not intended to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A waterproof structure for underground engineering wall-penetrating pipe bonding, characterized in that: include: A wall (1); a waterproof roll (2) provided on the water-facing side of the wall (1); a sleeve (3) passing through the wall (1); a wall-penetrating pipe (4) placed in the sleeve (3); a support ring (5) sleeved on the wall-penetrating pipe (4) and abutting the front side of the sleeve (3); and a water-stop sleeve (6) sleeved on the wall-penetrating pipe (4) and abutting the front side of the support ring (5); The water-stop sleeve (6) and the wall-penetrating pipe (4), and the water-stop sleeve (6) and the wall (1) are both bonded by adhesive; the support ring (5) and the water-stop sleeve (6) are not bonded.

2. The underground engineering wall-penetrating pipe bonding waterproof structure according to claim 1, characterized in that: A hidden pile hole (7) is provided on the wall (1) outside the support ring (5); the hidden pile hole (7) is filled with an epoxy adhesive for bonding with the water stop sleeve (6).

3. The underground engineering wall-penetrating pipe bonding waterproof structure according to claim 1, characterized in that: The underground engineering wall-penetrating pipe bonding waterproof structure further comprises: a double-sided polyisobutylene tape; the waterproof roll (2) and the water-stop sleeve (6) are overlapped by the double-sided polyisobutylene tape.

4. The underground engineering wall-penetrating pipe bonding waterproof structure according to claim 1, characterized in that: The underground engineering wall-penetrating pipe (4) adhesive waterproof structure further comprises: a pipe clamp (8) which is sleeved on the water-stop sleeve (6) and locks the water-stop sleeve (6) on the wall-penetrating pipe (4).

5. The underground engineering wall-penetrating pipe bonding waterproof structure according to claim 1, characterized in that: The adhesive is an epoxy adhesive.

6. The underground engineering wall-penetrating pipe bonding waterproof structure according to claim 1, characterized in that: The water-stop sleeve (6) is a soft PVC water-stop sleeve.

7. A construction method for waterproofing underground wall pipes, characterized in that: The following steps are involved: S1. Place a sleeve (3) in the wall (1), fix the sleeve (3) in place, install the formwork (9), and then cast the wall (1); S2, remove the template (9), and place the wall-penetrating pipe (4) into the sleeve (3) for installation and positioning; S3, inserting the support ring (5) into the wall-penetrating pipe (4), with the support ring (5) abutting against the sleeve (3); S4, drilling hidden pile holes (7) on the wall (1) outside the support ring (5); S5, cleaning the bonding area of ​​the wall-penetrating pipe (4) and applying a circle of epoxy adhesive; S6. Insert the water stop sleeve (6) into the wall pipe (4) and tighten it with the pipe clamp (8); S7, applying epoxy adhesive to the bonding area on the wall (1) outside the support ring (5), filling the hidden pile hole (7) with epoxy adhesive, and bonding the water stop sleeve (6); S8. On the water-facing side, the water stop sleeve (6) is overlapped with the waterproof membrane (2) using double-sided polyisobutylene tape to achieve a seamless connection; The support ring (5) is not bonded to the water-stop sleeve (6).

8. A construction method according to claim 7, characterized in that: In S6, the water-stop sleeve (6) is heated by a hot air blower and is then inserted into the wall-penetrating pipe (4) while it is still hot.

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